33. The function P(x) = x3 -10x2 + 9x - 90, where x is the number of items sold, models the profit P(x), in dollars, for Company A. The company breaks even when the profit is $0. How many items must Company A sell to break even?

Answer and Explanation

Your Answer is

Correct Answer is D

Explanation

Let P(x)=0, x2(x-10)+9(x-10)=0, that is (x2+9)( x-10)=0, so x=10